Question

two cones with same base of radius 8 cm and 15 cm are joined together along their base.find the surface area of the shape so formed and it is given that slant heights of cones are 9 and 7 cm respectively

Answer 1

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Answer 2

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After joining, the surface area will consist of lateral surface areas of two cones.

cm

r = 8cm

h = 15cm

l = √8² + 15² = √64+225 = √289 = 17cm

Surface area = 2×πrl = 2×3.14×8×17 = 854 cm²

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